Removal of arsenic from liquids and gases.



.To all whom it ma/y concern:

'rn'r nice.

OSOARJONAS, OF GRIESHEIM, GERMANY, ASSIGNOR TO GHEMISGHE FABRIK GRIESHEIM ELECTRON, OF FRANKFORT-ON-THE-MAIN,

GERMANY, A CORPORATION OF GERMANY.

REMOVAL-F ARsENIc FROM LIQUIDS AND GASES.

Specification of Letters Patent.

Application filed March 4, 1907. Serial No. 360,610.

Be it known that I, OSCAR JONAS, a subject of the Em eror of Germany, and a resident of Gries eim-on-the-Main, Germany, have invented certain new and useful Impirovements in the Removal of Arsenic from iquids and Gases, of which the following is a specification.

- fluohydric acid.

Further investigations regarding the removal of arsenic from liquids and gases (and especially from sulfuric acid, hydrochloric acid, fluohydric acid and gases which contain sulfur dioxid) have shown me that the hem. zene derivatives mentioned in .my ap lica tion for Letters Patent of the United tates of January 25th 1907 Serial'No; 354157 can be replaced by derivatives of the aliphatic hydrocarbons which are not able to form salts for removing arsenic from liquids and gases with advantage and the b arsenic be colorless. i

For removing arsenic from sulfuric acid for instance, tetrachlorid of carbon is most suitable.

The process can be carried out for example as follows: Presuming that sulfuric acid of 66 Baum containing 0.1 per cent. arsenic is to'be treated, it is mlxed 1n a stirring vessel with 6 per mille hydrochloric acid of 24 Baum, or with the equivalentamount of 10per cent. of tetrachlorid of carbon is then added and the-whole is well stirred for a few minutes. then allowed to become clear and the tetra chlorid of carbon, which now contains the arsenic, is removed. In order to regenerate the tetrachlorid of carbon which has become odies deprived of The mixture is saturated with arsenic, it is treated with about double its quantity of water whereby the tetrachlorid of carbon will be entirely deprived of its arsenic. The acid from which ithe arsenic has been removed is quite coloress.

In order toremovearsenic from gases it is preferred to fuse acetylene tetrach orid, on account of its high boiling point. If the gases and solvent be allowed to ass in towers in opposite directions, a pe ectre- Patented June 23, 1908.

moval of the arsenic is obtained. The acety lenetetrachlorid can also be' regenerated for reuse by. removing the arsenic by washing with water;

- The aforesaid two bodies possess also the reat advanta e that they are non-combustile, so thatt e removal of arsenic can be efiected without danger.

I Having thus described the invention what is claimed is- The herein described process of efiecting the removal of arsenic from 1i uids and ases in which the arsenic is in the orm of ch orid or fluorid consisting in treating the said liquids or'gases with a pure halogen derivative of one of the aliphatic hydrocarbons which are not able to form salts substantially as and for the purpose set forth.

' In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. I

OSCAR JONAS. 

